Secret fleet of stealth fighters?
China is copying fighters from every country. To make something new, they need to copy from somewhere. Don't tell me they copied F22, though someday they'll copy that too.
China is slowly turning into a big rival for the rest of the world, not because its developing fast, but because it is copying technologies from other developed countries to develop fast and not giving anything worthwhile in return.
J-XX is the first stealth fighter and its gonna take 7-12 years for induction.
I am almost convinced that you are a typical Indian troll who has no clue whatsoever on either millitary knowledge or anything else beyond that.
1. one needs skills to copy. Japan was the Copy Capital of the World not long ago followed by Hong Kong, Korea, etc, so was the US when it copied most of the UK and German technologies, both civil and millitary, at the turn of the last century. The examples are endless. So it's natural for CHina to do so.
2. What's sad is that some countries, such as India, with all the advantages that it has, such as it can buy almost any high tech jets in the world(Su35, typhoon, rafael, F18, F35...) which China is not allowed to get even a close look at, India with its low IQ still can not successfully copy and/or learn from any sub-system tech of them . How pathetic is that?
3. J-XX's likely success is based on China's own tech and strneghth of much broader industrial base mostly, as China owns the 3rd largest wind tunnel in the world (after the US and Russia) and will soon become the 2rd largest bar USA, even far ahead of the EU in 5th gen fighter aerodynamics reseach which ultimately decides the body/design sophistication of the incoming fighter. The EU doesn't have much meaningful wind tunnel data thus can not make our own 5th gen fighters within the next 15 years at least.
Conclusion: J-XX will almost certainly come with a very advanced aerodynamics design in the near future due to aforementioned facts. It will mostly likely come with canads which has totally different aerodynamic nature from F-22A and T-50 ( one just can not copy here) , while not being neccesaily less advanced than those two in this department; yet the EU still can't.
And India? it will almost permanently remain as a backwater laggard, holding its begging bowl around to purchase others' arms.